I get maybe 30 passes out of a trans before I start burning clutches in the direct and intermediates. I have upgraded the intermediates to 4 frictions, and the direct to a 6 frictions with .065 clearance. Im thinking it's the pump not putting out enough presure. Any recomendations?.
Another question is my trans brake when applied let's the car roll forward about 2 inches before it engages. I have checked my spool valve it is free in the bore your help is appresiated.

I need some details about the car first. weight, tire size, rear gear ratio, launch rpm, shift rpm ,finishline rpm.Best et and 60 ft.
How much line pressure do you have now, what type of transbrake do you use.